<template>
  <div v-if="isExternal" :style="styleExternalIcon" class="svg-external-icon svg-icon" v-on="$listeners"/>
  <svg v-else :class="svgClass" aria-hidden="true" v-on="$listeners">
    <use :xlink:href="iconName" />
  </svg>
</template>

<script lang="ts">
// doc: https://panjiachen.github.io/vue-element-admin-site/feature/component/svg-icon.html#usage
import { isExternal } from '@/utils/validate'
import { Component, Prop, Vue } from 'vue-property-decorator'

@Component
export default class SvgIcon extends Vue {
  @Prop()
  iconClass!:string

  @Prop({ default: '' })
  className?:string

  get isExternal () :boolean {
    return isExternal(this.iconClass)
  }

  get iconName () :string {
    return `#icon-${this.iconClass}`
  }

  get svgClass () :string {
    return `svg-icon ${this.className}`
  }

  // eslint-disable-next-line
  get styleExternalIcon () :any {
    return {
      mask: `url(${this.iconClass}) no-repeat 50% 50%`,
      '-webkit-mask': `url(${this.iconClass}) no-repeat 50% 50%`
    }
  }
}
</script>

<style scoped>
.svg-icon {
    width: 1em;
    height: 1em;
    vertical-align: -0.15em;
    fill: currentColor;
    overflow: hidden;
}

.svg-external-icon {
    background-color: currentColor;
    mask-size: cover !important;
    display: inline-block;
}
</style>
